add sqlite3 to runtime image for admin queries

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Co-Authored-By: Claude Opus 4.5 <[e-mail]>

Dockerfile

···
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates \
     libsqlite3-0 \
+    sqlite3 \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app